CN110510865A - A kind of single layer two-dimensional material and its photoactivation method in the preparation of micro-nano fiber surface - Google Patents
A kind of single layer two-dimensional material and its photoactivation method in the preparation of micro-nano fiber surface Download PDFInfo
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- C03—GLASS; MINERAL OR SLAG WOOL
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- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
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- C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
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- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
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- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/46—Sulfur-, selenium- or tellurium-containing compounds
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Abstract
The present invention provides a kind of single layer two-dimensional materials and its photoactivation method in the preparation of micro-nano fiber surface, belong to monocrystalline synthesis field.The present invention provide the preparation method of the single layer two-dimensional material prepared on micro-nano fiber surface based on chemical vapour deposition technique, include the following steps: that the micro-nano fiber that will have been drawn is placed on the quartz boat bottom of back-off, it is placed in tube type high-temperature furnace, adjust suitable growth procedure, it may be implemented to grow single layer two-dimensional material from 0.3 μm -20 μm of optical fiber surface in diameter, after photoactivation is handled, quantum efficiency can achieve 30%.The method of the present invention is simple and efficient, is inexpensive.The two-dimensional material surface quality of prepared optical fiber surface is good, and luminous efficiency is high, has potential application value in fields such as coherent source, nonlinear optics, photoelectronics.
Description
Technical field
The present invention relates to a kind of single layer two-dimensional materials, and in particular to a kind of single layer two dimension material in the preparation of micro-nano fiber surface
Material and its photoactivation method belong to monocrystalline synthesis field.
Background technique
Single layer two-dimensional material is a kind of direct band-gap semicondictor material of covering visible light near infrared band, its appearance
New chance is provided for luminescent device is integrated.Theoretically, the monoatomic layer thickness that they are possessed enhances electron-hole
Interaction, can realize excitonic luminescence at room temperature.However, introduced defect then greatly reduces it in the synthesis process
Luminous efficiency.
Unformed silicon is photoelectron, the critical material of fiber optic communication and optical microcavity field, and common growth and branch
Support the substrate of two-dimensional material.Previous work shows that silicon face has the very high trap density of states, with the current-carrying in single layer two-dimensional material
Sub- density is suitable, and when scantling is reduced to micro-nano-scale, the quantity and specific surface area of free suspension key can all increase, table
The chemical reaction in face will differ from its block materials, this shows that the micro-nano material of silicon substrate acts not only as growth two-dimensional material
Substrate and the chemical reaction for increasing them can also modulate its photoelectric property, by evanescent wave coupling technique, increase two-dimensional material
With the action intensity of signal light.
In the prior art, document " W.Li, B.G.Chen, C.Meng, W.Fang, Y.Xiao, X.Y.Li, Z.F.Hu,
Y.X.Xu,L.M.Tong,H.Q.Wang,W.T.Liu,J.M.Bao,Y.R.Shen,Ultrafast All-Optical
Graphene Modulator.Nano Lett.2014,14,955-959 " has studied compound based on graphene covering micro-nano fiber
The ultrafast full optical modulator of structure, but the graphene for tearing out is first covered on micro-nano fiber with adhesive tape by this method, is connect
Cut away extra part with nanosecond laser, operation difficulty is big and complicated.Document " Y.Mi, Z.P.Zhang, L.Y.Zhao,
S.Zhang,J.Chen,Q.Q.Ji,J.P.Shi,X.B.Zhou,R.Wang,J.Shi,W.N.Du,Z.Y.Wu,X.H.Qiu,
Q.Zhang,Y.F.Zhang,X.F.Liu,Tuning Excitonic Properties of Monolayer MoS2 with
Microsphere Cavity by High-Throughput Chemical Vapor Deposition
Method.Small.2017.13 ", which is reported, grows two-dimensional material in bead surface by chemical vapour deposition technique, and observes
Whispering-gallery-mode, but bead size is larger and the Enhancement of Fluorescence of two-dimensional material is not observed.
Shown in sum up, it is simple and be grown in optical fiber with Enhancement of Fluorescence to lack a kind of synthetic method in the prior art
The two-dimensional material on surface.
Summary of the invention
The present invention is to carry out to solve the above-mentioned problems, and it is an object of the present invention to provide a kind of prepare on micro-nano fiber surface
Single layer two-dimensional material and its photoactivation method.
The present invention provides a kind of single layer two-dimensional materials in the preparation of micro-nano fiber surface, have the feature that, prepare
Method includes the following steps: the quartz that sulfur family nonmetallic materials, transition metal oxide and micro-nano fiber are put into high temperature furnace
Guan Zhong replaces the gas in quartz ampoule, is passed through hydrogen and argon gas from one end of quartz ampoule, makes air pressure 90000Pa- in quartz ampoule
After 110000Pa, continue to be passed through hydrogen and argon gas, and from quartz ampoule other end pass-out, keep constant air pressure in quartz ampoule, it is high
Warm furnace is warming up to 800 DEG C -900 DEG C with the rate of 35 DEG C/min-45 DEG C/min, keeps 3min-5min, Temperature fall to get
The single layer two-dimensional material of micro-nano fiber surface preparation, wherein sulfur family nonmetallic materials are sulphur powder or selenium powder；Sulfur family nonmetallic materials
Mass ratio with transition metal oxide is (2-15): 1；The flow for being passed through hydrogen is 0sccm-5sccm, is passed through the flow of argon gas
For 100sccm-250sccm.
Provided by the invention in the single layer two-dimensional material of micro-nano fiber surface preparation, there can also be such spy
Sign: where sulfur family nonmetallic materials are placed in quartz boat, and quartz boat is placed in the low-temperature space of high temperature furnace and compared with transition metal
Oxide is closer to one end for being passed through gas of quartz ampoule.
Provided by the invention in the single layer two-dimensional material of micro-nano fiber surface preparation, there can also be such spy
Sign: where transition metal oxide is placed in quartz boat, and quartz boat is placed on the center warm area in quartz ampoule and non-compared with sulfur family
Metal material closer to quartz ampoule vent one end.
Provided by the invention in the single layer two-dimensional material of micro-nano fiber surface preparation, there can also be such spy
Sign: where micro-nano fiber is placed on the bottom of the quartz boat of back-off, and a piece of silicon wafer is respectively put in the two sides of the bottom of quartz boat, then will
One block of glass is pressed in above micro-nano fiber, to form a micro-nano fiber apparatus for placing, micro-nano fiber apparatus for placing is placed
In quartz ampoule, compared with sulfur family nonmetallic materials and transition metal oxide closer to one end of quartz ampoule vent.
Provided by the invention in the single layer two-dimensional material of micro-nano fiber surface preparation, there can also be such spy
Sign: where silicon wafer is the cuboid of long 2mm-10mm, width 2mm-10mm, high 0.3mm-1mm, and glass is long 1cm-5cm, width
The cuboid of 1cm-5cm, high 2mm-10mm.
Provided by the invention in the single layer two-dimensional material of micro-nano fiber surface preparation, there can also be such spy
Sign: where the preparation method of micro-nano fiber includes the following steps: standard fiber peelling off coat, uses CO2Laser illumination
Heating or gas flame heating, control heating time, adjusting tensile speed was 4mm/s-10mm/s to get micro-nano in 3s-10s
Optical fiber, the diameter of micro-nano fiber are 0.3 μm -20 μm.
Provided by the invention in the single layer two-dimensional material of micro-nano fiber surface preparation, there can also be such spy
Sign: where any one of transition metal oxide in molybdenum trioxide, tungstic acid.
The present invention also provides a kind of photoactivation method of single layer two-dimensional material in the preparation of micro-nano fiber surface, have
Such feature: including the following steps: to take the single layer two-dimensional material in the preparation of micro-nano fiber surface, is 500 μ W-2500 with power
μ W, the laser that wavelength is 405nm-810nm irradiate two-dimensional material by microscope, can activate, microscope is that amplification factor is
50 times -100 times of optical microscopy.
The action and effect of invention
The method for preparing single layer two-dimensional material in optical fiber surface involved according to the present invention, because of the micro-nano that will have been drawn
Optical fiber is placed in tube type high-temperature furnace, is adjusted and is arrived suitable growth procedure, may be implemented to close on the micro-nano fiber surface of different-diameter
At large area, the single layer two-dimensional material of high quality, greatly reduced in huge amorphous silica during stretching
Siloxanes key and micro optical fiber on free oxygen dangling bonds activation energy, so, method of the invention is simple, low in cost, can
To realize that diameter grows two-dimensional material, the two-dimentional material on micro-nano fiber surface obtained from 0.3 μm -20 μm of micro-nano fiber surface
Expect that surface quality is good, luminous efficiency is high, it is only necessary to use simple photoactivation method, can be obtained enhanced strength and highly stable
Fluorescence efficiency, have important potential using value in fields such as coherent source, nonlinear optics, photoelectronics.
Detailed description of the invention
Fig. 1 is the placement schematic diagram of each raw material in quartz ampoule in the embodiment of the present invention 1-2；
Fig. 2 is the structural schematic diagram of micro-nano fiber apparatus for placing in the embodiment of the present invention 1-2；
Fig. 3 is the optics picture for the molybdenum disulfide being grown on micro-nano fiber in the embodiment of the present invention 1；
Fig. 4 is the optics picture for two selenizing molybdenums being grown on micro-nano fiber in the embodiment of the present invention 2；
Fig. 5 is the molybdenum disulfide fluorescence efficiency and plane curing being grown on micro-nano fiber in the embodiment of the present invention 1
The fluorescence efficiency comparison diagram of molybdenum.
Specific embodiment
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below
Examples and drawings are closed to be specifically addressed the present invention.
Equipment or raw material size or model in following embodiments is as follows:
Tube type high-temperature furnace is the tube type high-temperature furnace of Resistant heating.
The quartzy bore being mounted in tube type high-temperature furnace is 48mm, outer diameter 50mm, a length of 1.2m.
Silicon wafer is the cuboid of long 5mm, width 5mm, high 0.5mm.
Quartz glass is the cuboid of long 3cm, width 3cm, high 5mm.
Quartz boat is the cuboid of long 4cm, width 3cm, high 1cm, thickness 1mm.
<embodiment 1>
A kind of single layer two-dimensional material in the preparation of micro-nano fiber surface, preparation step are as follows:
200mg sulphur powder is placed into quartz boat, sulphur powder quartz boat is obtained；20mg molybdenum trioxide is placed into quartz boat
In, obtain molybdenum trioxide quartz boat.
Fig. 2 is the structural schematic diagram of micro-nano fiber apparatus for placing in the embodiment of the present invention 1-2.
As shown in Fig. 2, 2 micro-nano fibers 6 are placed on 9 bottom of quartz boat of back-off, in 9 bottom of quartz boat of back-off
A silicon wafer 7 is respectively put in two sides, and then one block of quartz glass 8 is pressed on quartz boat bottom, places to form a micro-nano fiber
Device 5.
Micro-nano fiber in the present embodiment the preparation method comprises the following steps: standard fiber (SMF-28, corning) is peelled off coat,
And fall the residue of optical fiber surface with alcohol wipe, obtain no coat optical fiber.It the use of wavelength is 10.6 μm, intensity is 50W CO2
Laser (Firestar fi, SYNRAD) hot spot is radiated on no coat optical fiber, and control heating time is 5s, is adjusted and is stretched
Speed 5mm/s can be obtained 6.6 μm of diameter of micro-nano fiber.
Fig. 1 is the placement schematic diagram of each raw material in quartz ampoule in the embodiment of the present invention 1-2.
As shown in Figure 1, sulphur powder quartz boat 3 to be placed on to low temperature of 2 outside of quartz ampoule close to air inlet of tube type high-temperature furnace 1
Area, molybdenum trioxide quartz boat 4 are placed on the center heating warm area of the quartz ampoule of tube type high-temperature furnace 1, and micro-nano fiber apparatus for placing 5 is tight
The position of quartz ampoule gas outlet is disposed close to by molybdenum trioxide quartz boat 4.
After the completion of each experimental raw and equipment are placed, 2 both ends of quartz ampoule are sealed, are vacuumized from one end of quartz ampoule 2
To 100Pa hereinafter, being passed through argon gas from the other end again, 3 times repeatedly, to remove remaining gas molecule in quartz ampoule 2.Then, it adjusts
Saving the argon stream being passed through is 200sccm, and adjusts the gas flow of pass-out, and quartzy intraductal atmospheric pressure is made to be maintained at 100000Pa.Pipe
Formula high temperature furnace 1 is warming up to 800 DEG C with the speed of 40 DEG C/min, and in 800 DEG C of holding 4min.In the process, molybdenum disulfide is heavy
Product is on the surface of micro-nano fiber 6.Tube type high-temperature furnace 1 and Temperature fall are closed, optical fiber is taken out when temperature drops to room temperature, obtains table
Face has the optical fiber of single layer molybdenum disulfide.
Fig. 3 is the optics picture for the molybdenum disulfide being grown on micro-nano fiber in the embodiment of the present invention 1.
As shown in figure 3, A refers to generating the molybdenum disulfide in optical fiber surface in figure.This shows to be made using the present embodiment
Surface have single layer molybdenum disulfide optical fiber on single layer molybdenum disulfide it is high-visible, show that this method is successfully realized in optical fiber
Surface forms single layer molybdenum disulfide.
<embodiment 2>
A kind of single layer two-dimensional material in the preparation of micro-nano fiber surface, preparation step are as follows:
300mg selenium powder is placed into quartz boat, selenium powder quartz boat is obtained；20mg molybdenum trioxide is placed into quartz boat
In, obtain molybdenum trioxide quartz boat.
Fig. 2 is the structural schematic diagram of micro-nano fiber apparatus for placing in the embodiment of the present invention 1-2.
As shown in Fig. 2, 2 micro-nano fibers 6 are placed on 5 bottom of quartz boat of back-off, in 5 bottom of quartz boat of back-off
A silicon wafer 7 is respectively put in two sides, and then one block of quartz glass 8 is pressed on quartz boat bottom, places to form a micro-nano fiber
Device.
Micro-nano fiber in the present embodiment the preparation method comprises the following steps: standard fiber (SMF-28, corning) is peelled off coat,
And fall the residue of optical fiber surface with alcohol wipe, obtain no coat optical fiber.It the use of wavelength is 10.6 μm, intensity is 50W CO2
Laser (Firestar fi, SYNRAD) hot spot is radiated on no coat optical fiber, and control heating time is 5s, is adjusted and is stretched
Speed 6mm/s obtains 4.2 μm of diameter of micro-nano fiber.
Fig. 1 is the placement schematic diagram of each raw material in quartz ampoule in the embodiment of the present invention 1-2.
As shown in Figure 1, selenium powder quartz boat 3 to be placed on to low temperature of 2 outside of quartz ampoule close to air inlet of tube type high-temperature furnace 1
Area, molybdenum trioxide quartz boat 4 are placed on the center heating warm area of the quartz ampoule of tube type high-temperature furnace 1, and micro-nano fiber apparatus for placing 5 is tight
The position of quartz ampoule gas outlet is disposed close to by molybdenum trioxide quartz boat 4.
After the completion of each experimental raw and equipment are placed, 2 both ends of quartz ampoule are sealed, are vacuumized from one end of quartz ampoule 2
To 100Pa hereinafter, being passed through argon gas from the other end again, 3 times repeatedly, to remove remaining gas molecule in quartz ampoule 2.Then, together
When be passed through hydrogen and argon gas, and adjusting the argon stream being passed through is 200sccm, and the hydrogen gas stream being passed through is 5sccm, and is adjusted logical
Gas flow out makes quartzy intraductal atmospheric pressure be maintained at 100000Pa.Tube type high-temperature furnace 1 is warming up to 800 with the speed of 40 DEG C/min
DEG C, and in 800 DEG C of holding 4min.In the process, molybdenum disulfide is deposited on the surface of micro-nano fiber 6.Close tube type high-temperature furnace 1
And Temperature fall, optical fiber is taken out when temperature drops to room temperature, obtains the optical fiber that surface has two selenizing molybdenum of single layer.
Fig. 4 is the optics picture for two selenizing molybdenums being grown on micro-nano fiber in the embodiment of the present invention 2.
As shown in figure 4, B refers to generating the two selenizing molybdenums in optical fiber surface in figure.This shows to be made using the present embodiment
Surface have two selenizing molybdenum of single layer optical fiber on two selenizing molybdenum of single layer it is high-visible, show that this method is successfully realized in light
Fine surface forms two selenizing molybdenum of single layer.
<test case>
Fluorometric investigation
It is 100 times that surface made from Examples 1 and 2, which is placed on amplification factor with the micro-nano fiber of single layer two-dimensional material,
Optical microscopy under, using the laser irradiation that power is 1500 μ W, wavelength is 532nm, fluorescence intensity gradually enhances, 5 points
Stable fluorescence radiation is realized after clock.
In order to further verify, there is the fluorescence radiation of the micro-nano fiber of single layer two-dimensional material to surface produced by the present invention
Efficiency and the efficiency of plane molybdenum disulfide have carried out comparative experiments.After activating using same way, swashing for different power is used
Light irradiation, experimental result are as shown in Figure 5.
Fig. 5 is the molybdenum disulfide fluorescence efficiency and plane curing being grown on micro-nano fiber in the embodiment of the present invention 1
The fluorescence efficiency comparison diagram of molybdenum.
As shown in figure 5, abscissa indicates exciting power, ordinate indicates fluorescence quantum efficiency, and 6.6 μm represent the present invention and mention
The molybdenum disulfide fluorescence efficiency curve being grown on micro-nano fiber supplied, the fluorescence efficiency that Planar represents plane molybdenum disulfide are bent
Line.
As shown in Figure 5, the fluorescence quantum efficiency highest of plane molybdenum disulfide only has 0.04%.And under low exciting power
(0.004 μ W), surface provided by the invention have the fluorescence quantum efficiency of the molybdenum disulfide on the optical fiber of single layer molybdenum disulfide can
To reach 30%；Even if surface has the molybdenum disulfide on the optical fiber of single layer molybdenum disulfide under high exciting power (120 μ W)
Fluorescence quantum efficiency still has 1%.
The action and effect of embodiment
Single layer two-dimensional material and its activation method are prepared in optical fiber surface according to involved in the present embodiment, because will draw
Good micro-nano fiber is placed in tube type high-temperature furnace, is adjusted and is arrived suitable growth procedure, the micro-nano light in different-diameter may be implemented
Fine surface synthesizes large area, the single layer two-dimensional material of high quality, greatly reduces huge amorphous two during stretching
The activation energy of free oxygen dangling bonds in siloxanes key and micro optical fiber in silica, so, the preparation method letter of the present embodiment
It is single, low in cost, diameter may be implemented and grow two-dimensional material, micro-nano light obtained from 0.3 μm -20 μm of micro-nano fiber surface
The two-dimensional material surface quality on fine surface is good, and luminous efficiency is high, it is only necessary to use simple photoactivation method, can be obtained intensity
Enhancing and highly stable fluorescence efficiency, there is important potential application in fields such as coherent source, nonlinear optics, photoelectronics
Value.
Above embodiment is preferred case of the invention, the protection scope being not intended to limit the invention.
Claims (8)
1. a kind of single layer two-dimensional material in the preparation of micro-nano fiber surface, which is characterized in that preparation method includes the following steps:
Sulfur family nonmetallic materials, transition metal oxide and micro-nano fiber are put into the quartz ampoule of high temperature furnace, described in displacement
Gas in quartz ampoule is passed through hydrogen and argon gas from one end of the quartz ampoule, makes air pressure 90000Pa- in the quartz ampoule
After 110000Pa, continue to be passed through hydrogen and argon gas, and from the quartz ampoule other end pass-out, keeps air pressure in the quartz ampoule
Constant, high temperature furnace is warming up to 800 DEG C -900 DEG C with the rate of 35 DEG C/min-45 DEG C/min, keeps 3min-5min, Temperature fall,
The single layer two-dimensional material prepared to obtain the final product on micro-nano fiber surface,
Wherein, the sulfur family nonmetallic materials are sulphur powder or selenium powder；
The mass ratio of the sulfur family nonmetallic materials and the transition metal oxide is (2-15): 1；
The flow for being passed through hydrogen is 0sccm-5sccm, and the flow for being passed through argon gas is 100sccm-250sccm.
2. the single layer two-dimensional material according to claim 1 in the preparation of micro-nano fiber surface, it is characterised in that:
Wherein, the sulfur family nonmetallic materials are placed in quartz boat, and the quartz boat is placed on the low-temperature space of the high temperature furnace
The interior and more described transition metal oxide is closer to one end for being passed through gas of the quartz ampoule.
3. the single layer two-dimensional material according to claim 1 in the preparation of micro-nano fiber surface, it is characterised in that:
Wherein, the transition metal oxide is placed in quartz boat, and the quartz boat is placed on the center in the quartz ampoule
One end of the vent of warm area and the sulfur family nonmetallic materials closer to the quartz ampoule.
4. the single layer two-dimensional material according to claim 1 in the preparation of micro-nano fiber surface, it is characterised in that:
Wherein, the micro-nano fiber is placed on the bottom of the quartz boat of back-off, and piece of silicon is respectively put in the two sides of the bottom of the quartz boat
Then one block of glass is pressed in above the micro-nano fiber by piece, so that a micro-nano fiber apparatus for placing is formed,
The micro-nano fiber apparatus for placing is placed in the quartz ampoule, the sulfur family nonmetallic materials and the transition
Metal oxide is closer to one end of the quartz ampoule vent.
5. the single layer two-dimensional material according to claim 4 in the preparation of micro-nano fiber surface, it is characterised in that:
Wherein, the silicon wafer is the cuboid of long 2mm-10mm, width 2mm-10mm, high 0.3mm-1mm,
The glass is the cuboid of long 1cm-5cm, width 1cm-5cm, high 2mm-10mm.
6. the single layer two-dimensional material according to claim 1 in the preparation of micro-nano fiber surface, it is characterised in that:
Wherein, the preparation method of the micro-nano fiber includes the following steps:
Standard fiber is peelled off into coat, uses CO2Laser illumination heating or gas flame heating, control heating time exist
3s-10s, adjusting tensile speed is 4mm/s-10mm/s to get micro-nano fiber；
The diameter of the micro-nano fiber is 0.3 μm -20 μm.
7. the single layer two-dimensional material according to claim 1 in the preparation of micro-nano fiber surface, it is characterised in that:
Wherein, any one of the transition metal oxide in molybdenum trioxide, tungstic acid.
8. the photoactivation method of the single layer two-dimensional material prepared described in claim 1-7 any one on micro-nano fiber surface,
It is characterized by comprising the following steps:
The single layer two-dimensional material in the preparation of micro-nano fiber surface is taken, is 500 μ W-2500 μ W, wavelength 405nm-810nm with power
Laser by microscope irradiate two-dimensional material, can activate,
The microscope is the optical microscopy that amplification factor is 50 times -100 times.
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